[tex]\dfrac{8^5}{8^3} = 8^{5-3} = 8^2[/tex]
Answer: B
So the rule with dividing exponents of the same base is [tex] \frac{x^m}{x^n}=x^{m-n} [/tex]
Apply this rule here as such:
[tex] \frac{8^5}{8^3}=8^{5-3}=8^2 [/tex]
Your answer is 8², or B.